Embroidering-machine.



' ifiiizessea' E. WEBER.

EMBROIDERING MACHINE.

APPLICATION FILED SEPT. 11, 1913.

1, 1 48,557 Patented Aug. 3, 1915.

3 SHEETS-SHEET l- E. WEBER.

EMBROIDERING MACHINE.

APPLICATION FILED SEPT. n. 1913.

1,148,557. Patented Aug. 3, 1915.

3 SHEETS-SHEET 2- I .:L WlfflaS'J'eS." it 74 H 25 24 lizwnfart- Q QW E. WEBER.

EMBROIDERING MACHINE.

APPLICATION FILED SEPT. n. 1913.

Patented Aug. 3, 1915.

3 SHEETS-SHEET 3- X? 1$ *4 m M A? M//A LT on. m 2 5 5 w 3 .M QJ M nO WW MO .5 e m a .Mfiw

UNTTEE STATES FATENT @FFTQE.

EMIL WEBER, F ARBON, SWITZERLAND, ASSIGNOB TO THE FIRM OF ADOLPH SAUBER, OF ARBON, SWITZERLAND.

EMBROIDERING-MACI-IINE.

Application filed September 11, 1913.

, being had to the accompanying drawings,

and to letters or figures of reference marked thereon, which form a part of this specification.

In embroidering machines working in the usual manner the needle-thread is drawn out of the fabric during the oscillation of the major thread-guide, the brake which acts upon the holding or friction-members, for instance, the emery roller, being then brought into action. During the oscillation of the minor thread-guide the brake is out of action and the thread is drawn off the bobbins. In order to obtain a good circular festoon and similar kinds of stitches it, is, however, necessary to draw a small length of thread used for these stitches not from the bobbins but from the shuttles. To effect this it has already been proposed to putthe brake on the emery roller'whilethe minor thread-guide is oscillated. 'The brakes are, however, brought into action only once during each working cycle of the machine, so that the thread is still drawn off the bobbins during the oscillation of the majorthreadguide, there being therefore too much thread at the point where the fabric has to be embroidered.

The object of this invention is to provide a device for producing circular festoon and similar kinds of stitches, in which the holding members which act upon the needlethreads are actuated more than once during a working cycle of the embroidery machine, so that the thread is not drawn off the bobbins during the oscillation of the minor thread-guides and the thread is prevented from accumulating at the point where the stitch has to be produced.

A; further object of this invention is to provide means permitting the alteration in a device of this kind of the amplitude of oscillation of the major thread-guides, when it is desired to embroider circularfestoon or similar kind of stitches.

Specification of Letters Patent.

Patented Au. 3, 1915.

Serial No. 789,321.

The accompanying drawings illustrate by way of example convenient modes of carrying the invention into effect.

In these drawings Figure 1 is a front view of a portion of an embroidery machine equipped with a device constructed in accordance with this invention. Fig. 2 is a View in section on the line A A of Fig. 1. Fig. 3 shows some parts of the mechanism in different positions. Fig. 4 shows a modification. Fig. 5 is a right hand view of the lower parts of the mechanism shown in Fig. 4.. Figs. 6 and 7 show means for altering the amplitude of oscillation of the major thread guides.

The embroidery machine shown in Figs. 1-3 has a frame 1. On each side of this frame are provided on its front sides two bearing supports ,2 for the main driving shaft 3.

4 is the fabric to be embroidered.

5 are the shuttles arranged in two series and moved in vertical guides 7 by means of drivers 6. The drivers 6 for the shuttles of each series are connected to a rail 8, into which projects an arm 10 fixed to a vertical shaft 9. The shaft9 is pivotally connected to a rod 9, which is operatively connected in the usual manner to a lever 11 adapted to oscillate on a fixed pin 11 The lever 11 is provided with a roller 13 running in a groove of a cam disk 12 mounted on the driving shaft 3. The roller 13 causes the lever 11 to oscillate, so that the shaft 9 is moved up and down imparting thereby a corresponding movement to the shuttles 5.

1a are the needles, which are also arranged in two series. These needles are carried by supports 15 connected to slides 16 moved to and fro in a horizontal direction. For actuating the. slides 16 there are provided horizontal rods 17, crank arms 18, 19 mounted on shafts 19 and a rod 20, provided at its'lower end with a roller 21 running in a groove of a cam disk 22 mounted on the shaft 3.

23 are theminor thread guides and 24. the major thread-guides. For each series of needles there is provided such a major and a minor thread guide. Each of theminor thread guides 23 is connected by means of a crank arm .25 to a shaft 25, on which is mounted a second crank arm 26 connected to a vertical rod 27. The rod 27 carries at its lower end a roll 28, running on the circumratchet-wheel 36.

37 are the bobbins and 38 are the pawls operating said ratchet-wheels 36. The pawls 38 are connected to a common rod 39, pivoted at its lower end to a double-armed lever 40. To the other end of this lever 40 is at tached a roller 41. On the driving shaft 3 is mounted a sleeve 42, which may be shifted in the axial direction of the shaft 3 by means of a manually operated lever 43. The sleeve 42 consists of two adjacent cam disks 44 and 45. The cam disk 44 has two depressions 46 and 47, While the cam disk 45 has only one depression 48, corresponding to the depression 47.

This machine works as follows: While the embroidering operation is proceeding the shuttles 5, the needles 14 and the threadguides 23, 24 are operated in a known manner by the cam disks 12, 22, 29 and 29 mounted on the driving shaft 3 and the members acted upon by said disks. The sleeve 42 is then in the position in which the roller 41 of the lever 40 runs on the circumference of the cam disk 45. The pawls 38 fall therefore once into the teethof the corresponding ratchet wheels 36 during a work: ing cycle of the machine, so that the emery rollers 35 are locked only once, viz. in the moment in which the roll 41 runs over the depression 48 of the cam disk 45.1 This takes place when themaj or thread guides 24 are operated for the purpose of exerting a pull on the threads. If one wishes, however, to embroider circular festoons or buttonholes, the sleeve 42 is shifted by means of the lever 43 toward the left till the roll 41 lies on the circumference of the cam disk 44. As the latter has two depressions 46, 47 it is evident that the emery rollers 35 acting upon the bobbin-threads will be locked twice during a working cycle of the machine. The locking of the rollers 35 takes place for the second time just in the moment in which the minor thread-guides 23 begin to draw on the thread (Fig. 3), so that this locking of the emery roller for the second time prevents the thread guides 23 from drawing the thread away from the bobbins 37, as is usually the case, and the minor thread guides 23 draw therefore the thread out of the shuttles toward the frontend of the machine.

In the arrangement illustrated in Figs. 4 and 5 there are provided band brakes 49 instead of the ratchet-wheels 36. These brakes 49 are also acted upon by a rod 39, connected with a lever 40 carrying a roller 41 and con trolled as in the first instance by a cam disk 44 or 45 provided with one and two depressions respectively. These brakes 49 are operated when the roller 41 runs over the circular parts of said cam-disks 44, 45. It is evident, that the sleeve 42 could be made stationary and the roller 41 adjustable in the longitudinal direction of the driving shaft 3.

It has been found that the effect of the device is further improved if the amplitude of oscillation of the major thread guide is altered, when one starts to embroider circular festoons and similar kinds of stitches. Figs. 6 and 7 show such means permitting the alteration of the amplitude of oscillation of the major thread guides 24. According to the construction shown in these figures the disk mounted on the driving shaft 3 and acting upon the rod 33 connected by means of crank arms 32, shafts 31 and crank arms 30 to the major thread guides has the form of a sleeve 50 provided with two adjacent difierent shaped cam disks 51 and 52. This sleeve 50 is capable of being shifted in the longitudinal direction of the shaft 3, in the same manner as the above mentioned sleeve 42. In the present instance the sleeves 42 and 50 are shifted in the longitudinal direction by means of a manually operated hand lever 53. Owing to the difierent shape of the cam disks 51 and 52 a difi'erent amplitude of oscillation of the major thread guides 24 is obtained as soon as the'sleeve 50 is shifted along the driving shaft 3.

I claim: I

1. In an embroidering machine, the combination of stitching mechanism, means to operate the stitching mechanism, major and minor thread guides for drawing the threads, means for oscillating the thread guides, a thread holding roll for the threads, and means for permitting and preventing. the movement of the thread holding roll in synchronism with the movement of the thread guides and the stitching mechanism, such means comprising a detent for the thread holding roll and a cam with operative connections to said detent, said cam having two depressions and two lifts disposed in alternation,'whereby the thread holding roll is held from rotation during the the movement of the thread holding devices once or more than once for each Working cycle of the embroidering machine to permit the feeding and holding of the threads alternately, controlling devices to control the operation of said last named means, and means for altering the amplitude of oscillation o the thread guides.

3. In an embroidering machine, the combination of stitching mechanism, means to operate the stitching mechanism, thread holding devices for the needle threads, movable thread guides, means for actuating the thread guides, a plurality of actuating cams and transmitting mechanism to permit and prevent the movement of the thread holding devices once or more than once for each working cycle of the embroidering machine to permit the feeding and holding of the threads alternately, means to eflect operative engagement of one or the other of said cams With the transmitting mechanism, and means for altering simultaneously the amplitude of oscillation of the thread guides.

4. In an embroidering machine, the combination of stitching mechanism, means to operate the stitching mechanism, a roller about which the needle threads are passed, movable thread guides for the needle threads, means to actuate said thread guides, a plurality of actuating cams and transmitting mechanism to permit and prevent the movement of the roller once or more than once for each Working cycle of the embroidering machine to permit the feeding and holding of the threads alternately, means to effect operative engagement of one or the other of said cams With the transmitting mechanism, and means for altering simultaneously the amplitude of oscillation of the thread guides.

5. In an embroidering machine, the combination of stitching mechanism, means to operate the stitching mechanism, thread holding devices, a plurality of cams and transmitting mechanism to permit and prevent the movement of the thread holding devices, a thread guide, a plurality of cams and transmitting mechanism to oscillate the thread guide, both of said sets of cams being shiftable to bring one or the other of each set into operative relation With the corresponding transmitting mechanism and means to shift said sets of cams simultaneously.

In testimony that I claim the foregoing as my invention, I have signed my name in presence of tWo subscribing Witnesses.

EMIL WEBER.

Witnesses:

RANDALL ATKINSON, ARTHUR J OSEFFY.

Copies of this patent may be obtained for five cents each, by addressing the Commissionen of Patents, Washington, I). 0. 

